EP 1179375 A2 20020213 - Method for producing hot rolled steel sheet and apparatus therefor
Title (en)
Method for producing hot rolled steel sheet and apparatus therefor
Title (de)
Verfahren und Vorrichtung zur Herstellung von heizgewalztem Stahlband
Title (fr)
Méthode et dispositif pour produire du feuillard d'acier laminé à chaud
Publication
Application
Priority
- EP 97118950 A 19971030
- JP 28835796 A 19961030
- JP 29001096 A 19961031
Abstract (en)
A method and hot rolling apparatus for producing a hot rolled steel sheet (3) include a roughing rolling mill (12) to roughing roll a heated slab into a sheet bar, at least one solenoid-type induction heater (4) arranged for re-heating the sheet bar over its entire width, and a finish rolling mill (6) arranged to finish roll the re-heated sheet bar into a hot rolled steel sheet having a predetermined thickness. An initial temperature before rolling is set to be low, and re-heating of the sheet bar is carried out around the middle of the hot rolling apparatus. The thermal energy required for rolling is thereby reduced as a whole without damaging the quality of the resulting hot rolled steel sheet. A descaling apparatus (5) is provided prior to the finish rolling mill to remove oxide scales on surfaces of the sheet bar, whereby the resulting hot rolled steel sheet is free of scale flaws and exhibits superior surface properties. <IMAGE>
IPC 1-7
IPC 8 full level
B21B 1/26 (2006.01); B21B 37/74 (2006.01); B21B 45/00 (2006.01); B21B 45/08 (2006.01)
CPC (source: EP KR US)
B21B 1/26 (2013.01 - EP US); B21B 37/74 (2013.01 - EP US); B21B 45/00 (2013.01 - KR); B21B 45/004 (2013.01 - EP US); B21B 45/08 (2013.01 - EP US)
Designated contracting state (EPC)
DE GB
DOCDB simple family (publication)
EP 0839588 A1 19980506; EP 0839588 B1 20020522; DE 69712704 D1 20020627; DE 69712704 T2 20021121; DE 69736208 D1 20060803; DE 69736208 T2 20070516; EP 1179375 A2 20020213; EP 1179375 A3 20050119; EP 1179375 B1 20060621; KR 100254494 B1 20000501; KR 19980033296 A 19980725; US 5990464 A 19991123
DOCDB simple family (application)
EP 97118950 A 19971030; DE 69712704 T 19971030; DE 69736208 T 19971030; EP 01126517 A 19971030; KR 19970056078 A 19971029; US 95806997 A 19971027